Harrow



R. W. PAYNE.

RRRRR W.

ROBERT WITHnns PAYNE, er ;means Banner-I, vrReINL/i.

HARROW.

specification of Letters Patent.

Patented Aug. 2, 1921.

Application filed November 4, 1919. Serial No. 335,657.

To all whom it may Gomera Be it known that I, ROBERT 7. PAYNE, a citizenof the United States, residing at Drakes Branch, in the county ofCharlotte and State of Virginia, have invented a new and useful Harrow,of which the following is a specification.

This invention relates to improvements in harrows, and more particularlyto harrows of the spike toothed type.

The primary obj ect of the invention is to provide acombination harrowfor heavy and light work.

A further object of the invention is to provide a harrow of this typewherein the teeth thereof may be automatically moved from a Verticalposition to an inclined position, thus eliminating the use of levers andconnecting rods for accomplishing this result.

A still further obj ect of the invention is to provide a constructionywhich will remove the strain usually directed to the transversesupporting bars, and direct the same to the longitudinal bars of theharrow frame.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the in- Vention herein disclosed, may be made within thescope of what is claimed without departing from the spirit of theinvention.

Referring to the drawing Figure 1 illustrates a plan view of a harrowconstructed in accordance with the present invention, and disolosing theangle at which the same operates.

Fig. 2 is a fragmental elevational view of one of the longitudinal bars,and one of the teeth.

Fig. 3 illustrates a fragmental section view taken on line 3-3 of Fig.1.

Referring to the drawing in detail, the harrow forming the subjectmatter of the present invention includes the longtudinal right angledbars 5, secured in spaced relation with each other by means of theangularly disposed brace rods 6 and 7 which have connection with theouter bars 5, adjacent the end thereof, and have connection with theinter- 'mediate longitudinal bars by means of the bolts 8, passingthrough openings formecl in the longitudinal bars,`the openingsregistering with suitable openings in the anflularly disposed bracerods.l i Each of these longitudinally disposed bars .is provided withopenings 9, provided in the Vertical wall thei'eof, and disposed inspaced relation throughout the length thereof, the openingsof one bar 5bein in alinemeiit with the openings of the adjacent'bar 5 to accom-Inodate the'tooth supporting bars 10, so that the bars lQ may be free tomove therein, the bars 10 being of a construction to conform toI thecurvature of the openings 9, to permit oi such movement.

These bars 5 also include right angled portions, 11, which right angledportion of each laar 5 is provided with a plurality of slots 12, iormedthroughout the lengths thereof which slots accommodate the spike teethof the harrow, the teeth being of a size to permit the same to movewithin the slots to assume various positions.

rhe tooth su'pporting bars include pairs of 1transversely disposed bars,secured together oy means of the bolts 13 oassino' through suitableregisterino' opeiiiiigs thr in, the bars forming the respective pairsbeing indiczited hy the numerals h and 15, and as shown, these bars areprovided with the cut out portions 16, regisi';ering` with each other toac'coniinodate the teeth of the harrow, the openings, or slots 12, bemgdisposed directly under the cut out portiong so that harrow teethsupported by the cut-out portions 16 extend into the slot-s 12, and whenthe teeth are in a Vertical position, the same contact witl the endwalls 17, and restrict movement thereof, so that the teeth are supportedin a Vertical position, for accomplishing the harrowing result, to beemployed on newly plowed fields.

VVhen the harrow is to be employed for rough work, oi' to harrow newlyplowed soil, the draft appliaiice has connection with the harrow throughthe medium of the clevis 18, but when the draft appliances are attachedto the clevis 19, the teeth of the harrow contacting with the groundcauses the teeth to move to contact with the walls 20, at the oppositeends of the slots, consequently supporting the teeth 21 of the harrow inan inclined position, thus adapting the harrow for light or finishingwork.

t might be further lstated that the strain which is usually directed tothe supporting bars of the harrow, is directed to the right sie -angledportions 11V of the bars 5, the end walls of the slots receiving agreater part of the straln.

` It Will thus be scen that if the harrow con tacts With stationaryobjects in a field, such as for instance a stunip or an exceptionally'large rock, the jar Would cause the bendng of the teeth 21, and not thebending of the bars forining the frame of the harrow. It is o'bviousthat in view of the location of the clevises 18 and 19, the harrow isInovedV over a field at an` angle with relation to the 'horizontalcentral line of the harrow with said a-ngle irons having openings formedin' spaced' relation With each other, said openings being formed 111 theVertical Walls of the angle irons to provide bear1ngs,`sa1d angle ironshaving slots formed| in the hori zontal Walls thereof, thev slotsbeingvdisposed adja-cent the bearingvopenings, teeth supporting barsVarranged in'pairs having curved surfaces' and relatively straightSurfaces, vthe curved surfaces adapted to contact Withrthe walls of thebearings: for perinitting inovement of the teeth supporting bars, teethcarried between the teeth supporting bars of each pair, means forsecuring` the bars inV engageinent With the teeth, said teeth adapted tobe positioned in the slotsV and adapted to move therein, ,said teethadapted to restrict lateral Inovement of the teeth Supporting bars, andthe ends of said slots adapted to restrict movement ofthe teethlongitndinally .of the slots. i

In testimony that ela-im the foregoing as my own, I have hereto aihxedmy signa-v ture in the presence oftwofi witnesses.:

ROBERT Wim-inne 'PAYNE Witnesees: o J. C. GREGORL J. C. BooTH.

